docs: def get_line_value(self, context_type):
          """
          Get the values defined on this line.
  
          :param context_type: "ENV" or "LABEL"
          :return: values of given type defined on this line
          """
          if context_type.upper() == "ENV":
              return self.line_envs
          elif context_type.upper() == "LABEL":
              return self.line_labels